scholarly journals Slope Stability and Alternative Design Methodology for Highway Rock Cut Slopes in West Virginia

2014 ◽  
Author(s):  
Michael A. Kulbacki
Keyword(s):  
West Virginia ◽  
Slope Stability ◽  
Design Methodology ◽  
Alternative Design ◽  
Cut Slopes

Les éperons drainants dans les talus en déblai–présentation d'abaques de dimensionnement sur critères hydrauliques et mécaniques

1987 ◽  
Vol 24 (4) ◽  
pp. 590-600 ◽  
Author(s):  
P. Aigle ◽  
F. Desnouvaux ◽  
J. P. Prost
Keyword(s):  
Free Surface ◽  
Slope Stability ◽  
Experimental Research ◽  
Three Dimensional ◽  
Drainage Ditch ◽  
Analog Model ◽  
Design Charts ◽  
Present Design ◽  
Operating Instructions ◽  
Cut Slopes

The object of this article is to present design charts that facilitate the design of a series of parallel drainage spurs in association with a drainage ditch used in cut slopes. The hypotheses, the operating instructions, and the field of utilization are fully detailed.The two needed dimensions are the depth and spacing of the drainage spurs.The design charts are of two main types:–simple dimensioning charts: providing information on possible combinations of depth and spacing that give the quantitative effect wished by the designer, such as lowering the level of the water table or increasing the safety factor;–optimization charts: proposing an estimation of the solution that minimizes the depth of the spurs per linear metre of slope, and subsequently the volume of the draining material.This article results from theoretical and experimental research carried out over several years. We have been using a composite analog model that allows the simulation of free-surface three-dimensional flows. Key words: drainage, cut slopes, slope stability, drainage spur, analog model, three-dimensional.

scholarly journals Empirical and finite element based stability analysis of highway cut slopes in Uttarakhand Himalayan terrain, India

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Hari Om Singh ◽  
Tariq Anwar Ansari ◽  
T. N. Singh ◽  
K. H. Singh
Keyword(s):  
Numerical Simulation ◽  
Finite Element Method ◽  
Finite Element ◽  
Rock Mass ◽  
Stability Analysis ◽  
Slope Stability ◽  
Kinematic Analysis ◽  
Empirical Methods ◽  
Geotechnical Data ◽  
Cut Slopes

AbstractThe present paper deals with different empirical methods and finite element method of slope stability analysis along National Highway (NH)-7, in Uttarakhand, India. The highway is only path in the hilly terrain of Lesser Himalayan for the public transport and have strategic importance due to militaries possession routes. This route is also significant due to having many holistic places, connecting to this. There was numerous landslides happened along the Highway in past due to various natural and anthropogenic activities. Hence, keeping an eye to the socio-economic development of the distant area, slope stability analysis is very crucial along the road cut sections. To identify the vulnerable locations and to collect the geotechnical data, the field investigation was carried out between Shivpuri to Byasi along NH-7 in Garhwal, Uttarakhand. Then geotechnical data was intended followed by rock mass characteristic, kinematic analysis and Qslope stability. Additionally, to review the stability results, numerical simulation (finite element method) was employed and slope mass behavior and failure mechanism of cut slopes were also evaluated. The rock mass characteristic and kinematic analysis illustrate normal and good variety of rock mass mainly wedge mode with flexural toppling of failure. The slope mass rating, continuous slope mass rating and also Qslope stability analysis showed, road cut slopes are critically stable and unstable. The results of different empirical methods shows a decent correlation between them. Further the numerical simulation analysis also evaluates that two cut slopes are unstable and other one is critically stable. This substantial empirical and numerical analysis of cut slopes provides a collective approach to stable and develop the holistic road corridor in Himalayan terrain.

scholarly journals Integrated Analysis Method for Stability Analysis and Maintenance of Cut-Slope in Urban

2021 ◽  
Author(s):  
Mincheol Park ◽  
Heuisoo Han ◽  
Yoonhwa Jin
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Slope Failure ◽  
Slope Stability Analysis ◽  
Velocity Curve ◽  
Integrated Analysis ◽  
Cut Slope ◽  
Analysis Method ◽  
Cut Slopes ◽  
Inverse Velocity

In the process of constructing roads for the development of the city, cut-slopes are made by excavating mountains. However, these cut-slopes are degraded in strength by time-deterioration phenomenon, and progressive slope failure is caused. This study developed an integrated analysis method for stability analysis and maintenance of cut-slopes in urban. The slope stability analysis was performed using the finite element model, and the progressive slope failure by time-dependent deterioration was quantified by using the strength parameters of soil applying the strength reduction factor (SRF). The displacements until the slope failure by slope stability analysis were quantified by cumulative displacement curve, velocity curve, and inverse velocity curve and, applied to the slope maintenance method. The inverse-velocity curve applied to the prediction of the time of slope failure was regressed to the 1st linear equation in the brittle material and the 3rd polynomial equation in the ductile material. This is consistent with the proposed formula of Fukuzono and also shows similar behavior to the failure case in literature. In the future, integrated analysis method should be improved through additional research. And it should be applied to cut-slope to prevent disasters.

Ludic Design for Accessibility in the Global South

2021 ◽  
pp. 269-287
Author(s):  
Manohar Swaminathan ◽  
Joyojeet Pal
Keyword(s):  
Assistive Technology ◽  
Functional Outcomes ◽  
Design Methodology ◽  
Resource Constraints ◽  
Cost Benefit Analysis ◽  
Cost Benefit ◽  
Global South ◽  
Benefit Analysis ◽  
Alternative Design ◽  
People First

Technology solutions for accessibility have long been created using a narrow utilitarian lens, especially in the Global South, due to multi-dimensional challenges and resource constraints: an emphasis on purely functional outcomes supported by sterile cost–benefit analysis that ignores the fact that people with disability are people first, with their own aspirations for leisure and enjoyment in addition to skills and employment. We propose an alternative design methodology called the ludic design for accessibility (LDA) that puts play and playfulness at the center of all assistive technology design and use. We then describe a seven-step framework for designers to apply this methodology to create impactful solutions. Though LDA is universally applicable, we highlight the factors that make it especially relevant in the context of accessibility in the Global South.

Shakedown and Fatigue Evaluations of Overlay Cladding on Reactor Pressure Vessels

2011 ◽  
Author(s):  
Seiji Asada ◽  
Harutaka Suzuki ◽  
Toshiya Saruwatari
Keyword(s):  
Stress Distribution ◽  
Base Metal ◽  
Design Methodology ◽  
Evaluation Method ◽  
Pressure Vessels ◽  
Stress Evaluation ◽  
Alternative Design ◽  
Elastic Plastic ◽  
Plastic Analysis ◽  
Reactor Pressure

Overlay cladding is classified to non-pressure boundary. Not only the ASME Boiler & Pressure Vessels Code Section III [1] but also the JSME Design and Construction Code [2] prescribe that no structural strength shall be attributed to cladding and the presence of the cladding shall be considered with respect to both the thermal analysis and the stress analysis. This means the codes do not require stress evaluation for overlay cladding itself. If overlay cladding has a fatigue crack, the crack may grow and extend to the base metal. Thus overlay cladding may give an influence on the integrity of base metal in the pressure boundary. The thermal expansion of stainless steel cladding is different from that of base metal made of low alloy steel, and this difference causes discontinuity of stress distribution between the cladding and the base metal. It is questionable that a stress evaluation line is set on such stress distribution including discontinuity between the cladding and the base metal. An evaluation method based on elastic-plastic analysis is preferable to evaluate such portion. ASME B&PV Sec.III and Sec.VIII, Div. 2 [3] have plastic analysis provisions. Also the JSME D&C Code issued a code case on alternative design methodology by using elastic-plastic finite element analysis for Class 1 vessels [4, 5]. In this paper, shakedown, fatigue and environmental fatigue evaluations are performed for the overlay cladding of direct vessel injection nozzle of Reactor Pressure Vessel by using the JSME Code Case on the alternative design methodology.

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